Generate chrome_300_percent.pak

chrome/app/theme/theme_resources.grd

 <?xml version="1.0" encoding="utf-8"?>
 <!-- This grd file contains images that are pre-scaled for device scale
      factors. The image returned by |base::ResourceBundle::GetImageNamed|
      will contain multiple |gfx:ImageSkiaReps| for each scale factors. The
      |fallback_to_low_resolution| attribute controls behavior when
      an image file is missing for target scale factor. If true, chrome
      will automatically scale the 1x image to the target scale factor.
      If false, build will fail due to missing resources. This is
      currently set to true for all resources, but the default will
      become false in near future.
   -->
 <grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/theme_resources.h" type="rc_header" context="default_100_percent">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="grit/theme_resources_map.cc" type="resource_map_source" context="default_100_percent" />
     <output filename="grit/theme_resources_map.h" type="resource_map_header" context="default_100_percent" />
     <output filename="theme_resources_100_percent.pak" type="data_package" context="default_100_percent" />
     <output filename="theme_resources_200_percent.pak" type="data_package" context="default_200_percent" />
+    <output filename="theme_resources_300_percent.pak" type="data_package" context="default_300_percent" />
   </outputs>
   <release seq="1">
     <structures fallback_to_low_resolution="true">
       <!-- KEEP THESE IN ALPHABETICAL ORDER!  DO NOT ADD TO RANDOM PLACES JUST
            BECAUSE YOUR RESOURCES ARE FUNCTIONALLY RELATED OR FALL UNDER THE
            SAME CONDITIONALS. -->
       <structure type="chrome_scaled_image" name="IDR_ACCESSED_COOKIES" file="common/accessed_cookies.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_DOWNLOADS" file="common/allowed_downloads.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_FULLSCREEN" file="common/allowed_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_IMAGES" file="common/allowed_images.png" />
@@ skipping 1166 matching lines @@
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL" file="common/mail.png" />
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL_HOVER" file="common/mail_hover.png" />
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL_PRESSED" file="common/mail_pressed.png" />
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT" file="common/chat.png" />
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT_HOVER" file="common/chat_hover.png" />
       <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT_PRESSED" file="common/chat_pressed.png" />
 
     </structures>
   </release>
 </grit>